Weekend game deals: 50% off QuakeCon 2010 Pack

Commemorating QuakeCon 2010, Valve is slashing a hefty sum off a different title every day until Sunday. If you hurry, you can still grab yesterday's deal (66% off Oblivion GOTY), but if you miss it, 66% off the Doom Pack should cheer you up. The bundle includes Ultimate Doom, Doom II, Master Levels for Doom II, Final Doom, Doom 3, and Doom 3: Resurrection of Evil. Here's what's coming over the weekend and a few other sales currently on Steam: